jorvack wrote:
I haven't much to add except to say I would think Twin Cities ranks consistently above Grandma's having run both.
Its been a few years, maybe TCM has gotten softer?
I would put Chicago NY Boston in the same category - depends on who shows up each year.
Chicago is certainly the best for the journeyman runner to run a PR due to the course and weather stability.
FWIW last year Grandma's had 221 sub 3 out of 6438 and Twin Cities had 167 sub 3 out of 7518.
Twin Cities is definitely a tougher course though, and the guy who won Grandma's last year got second at Twin Cities.